Dab tsi yog Qhov Kev tawg - pov thawj Kev Ntsuas Ntawm Kev tawg - cov ntaub ntawv pov thawj Distribution Boxes?

Qhov tawg - pov thawj ntsuas ntawm ibtawg-cov ntaub ntawv pov thawj lub thawvfeem ntau tsis yog ib daim ntawv lo, tab sis kev sib xyaw ua ke ntawm ntau qhov ntev, suav nrog kev tawg -cov ntaub ntawv pov thawj hom thiab chav ntsuas kub, kom paub meej qhov kev nyab xeeb ntawm ib puag ncig thiab qib kev nyab xeeb uas nws siv tau.

I. Common Explosion-Proof Types

1. Gas Atmosphere

Hom Flameproof
Mark: Ex d
Lub hauv paus ntsiab lus: Lub kaw lus tuaj yeem tiv taus lub siab tsim los ntawm kev tawg ntawm cov khoom tawg hauv qhov sib xyaw thiab tiv thaiv kev tawg ntawm kev nthuav tawm mus rau ib puag ncig.

Daim ntawv thov: Hom siv ntau tshaj plaws, haum rau Zone 1 thiab Zone 2 roj ib puag ncig.

 

Ntau hom kev nyab xeeb
Mark: Ex e
Lub hauv paus ntsiab lus: Rau cov khoom siv hluav taws xob uas yuav tsis tsim cov arcs lossis sparks nyob rau hauv ib txwm ua haujlwm, kev ntsuas raug coj los ua kom cov chav kawm rwb thaiv tsev los txhim kho nws txoj kev nyab xeeb.

Daim Ntawv Thov: Feem ntau siv hauv Cheeb Tsam 2, feem ntau siv ua ke nrog Ex d (piv txwv li, lub kaw lus muaj Ex d Cheebtsam, thiab daim ntawv pov thawj tag nrho yog Ex de).

 

Intrinsically Safe Hom
Mark: Ex i (ia or ib)
Lub hauv paus ntsiab lus: Lub zog tsim los ntawm Circuit Court nws tus kheej yog tsis txaus rau ignite ib puag ncig explosive cua. Feem ntau siv rau kev ntsuas thiab kev tswj lub teeb liab, tsis tshua muaj siv nyob rau hauv lub ntsiab Circuit Court ntawm siab - lub hwj chim faib lub thawv, tab sis yuav siv tau nyob rau hauv kev tswj circuits nyob rau hauv lub thawv tis.

 

Hom Siab
Mark: Ex p
Lub hauv paus ntsiab lus: Los ntawm kev tswj xyuas cov roj tiv thaiv sab hauv siab tshaj qhov siab ntawm sab nraud, cov cua kub sab nraud raug tiv thaiv kom tsis txhob nkag mus rau hauv qhov chaw kaw.

Cov ntawv thov: Haum rau cov thawv loj loj lossis cov ntawv thov uas muaj ntau lub tshav kub- tsim cov khoom.

 

2. Plua plav ib puag ncig
Plua plav tawg-Cov ntaub ntawv pov thawj
Marking: Ex tD or Ex t
Lub hauv paus ntsiab lus: Lub kaw lus muaj peev xwm tiv thaiv cov plua plav nkag thiab txwv qhov kub ntawm qhov chaw.

Daim ntaub ntawv: Haum rau qhov chaw uas muaj plua plav flammable (xws li Zone 21, Zone 22).

 

II. Explosion-Proof Zone Classification
Explosion-cov ntaub ntawv pov thawj muab faib raws li lawv qhov chaw siv:

Chav Kawm I:Cov khoom siv hluav taws xob rau cov mines hauv av, feem ntau yog rau methane thiab thee hmoov av.

Chav Kawm II:Cov khoom siv hluav taws xob rau lwm cov pa roj carbon monoxide (kev siv lub Hoobkas), tsis suav nrog cov mines thee.

Ntxiv subdivided raws li kev phom sij: IIA, IIB, IIC, sawv cev rau cov pab pawg roj sib txawv.

IIC yog qib siab tshaj (piv txwv li, hydrogen, acetylene), uas tuaj yeem npog IIB thiab IIA; IIB can cover IIA.

Chav Kawm III:Cov khoom siv hluav taws xob rau cov huab cua tawg, tsis suav nrog cov mines thee.

 

III. Kub Group

Gas Temperature Groups:

T1: 450 degree

T2: 300 degree

T3: 200 degree

T4: 135 degree

T5: 100 degree

T6: 85℃(qhov yuav tsum tau nruj tshaj plaws)

Cov thawv ntim khoom siv feem ntau yog T4, T5, lossis T6, nyob ntawm seb qhov kub ntawm cov khoom siv sab hauv thiab cov qauv tsim.

 

IV. Ua kom tawg tag-Cov piv txwv ntsuas pov thawj

1. Ex d IIB T4 (muaj feem xyuam rau Gases): tawg- hom pov thawj, haum rau Class IIB roj ib puag ncig, qhov siab tshaj plaws ntawm cov khoom siv saum npoo kub tsawg dua lossis sib npaug li 135℃.

 

2. Ex d IIC T6 (tseem siv tau rau Gases nrog Cov Kev Xav Tau Siab): Kev tawg- hom pov thawj, haum rau Class IIC gas ib puag ncig (xws li hydrogen), cov khoom siv siab tshaj plaws saum npoo kub tsawg dua lossis sib npaug li 85℃.

 

3. Ex de IIB T4 / Ex tD A21 IP65 (Gas + Dust Composite): Cov pa roj yog tawg- pov thawj thiab muaj kev nyab xeeb ntxiv, haum rau Class IIB gases; cov plua plav yog A21 qib (Zone 21 thaj chaw txaus ntshai) tawg- pov thawj, nrog qib tiv thaiv IP65.